This todo app features a Kanban-style board with drag-and-drop task management, now enhanced with user authentication using email magic links and data synchronization with a SQLite database.

• Kanban board with drag-and-drop functionality
• Collapsible unassigned tasks section
• Task prioritization (high, medium, low)
• Due dates with visual indicators for overdue and soon-due tasks
• User authentication with magic link emails
• Data synchronization between client and server
• Go backend with SQLite database

• Frontend: Vanilla JavaScript, CSS, HTML
• Backend: Go (Golang) with SQLite
• Authentication: Email magic links + JWT tokens

• Go 1.21 or higher
• SQLite3
• SMTP server for sending emails (optional for development)

Create a .env file in the project root with the following variables:

PORT=8080
JWT_SECRET=your_secret_key_here

# SMTP Configuration (optional for development)
SMTP_HOST=smtp.example.com
SMTP_PORT=587
SMTP_USERNAME=your_username
SMTP_PASSWORD=your_password
SMTP_FROM=noreply@example.com

1. Install Go dependencies:

   go mod download
   

2. Build and run the server:

   go run *.go
   

3. Access the application in your browser:

   http://localhost:8080
   

• For development, magic links are displayed in the UI and console
• The database file todo.db is created automatically on first run
• Data is synced between client and server every 30 seconds when authenticated